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Ontario’s proposed Highway 413 would cut through the habitat of several species at risk in the province. Critics are concerned it would harm local waterways as well, far beyond the actual highway itself, highlighting the ongoing push-and-pull between the federal and provincial governments across Canada, and between species protection and development.

Science reporter Ivan Semeniuk is back to walk us through how this struggle is playing out around the proposed highway and what it says about Canada’s efforts to protect its biodiversity.